Help with an algebra problem

Hello everyone. I need some help with this problem on my homework. Maybe just some tips in what to do first. This is my first time taking a math course in a few years and this is part of a review chapter before we get started with the actual text. I would really like to have a better understanding of the material before we start.

A gas station stores its gasoline in underground tanks that are right circular cylinders lying on their sides. The volume V of the gasoline in the tanks(in gallons) is given by the following formula:

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A gas station stores its gasoline in underground tanks that are right circular cylinders lying on their sides. The volume V of the gasoline in the tanks(in gallons) is given by the following formula:

There really is nothing more to solving it. You are given the equation with the variable 'h' and then you are give a value for 'h'. Just substitute the 'h' value into the given equation and either plug what you get in your calculator or solve it by hand. So in this case you would enter this into your calculator and voila you have an answer.